#include<stdio.h>
#include<errno.h>
#include<string.h>
int main()
{
  FILE* fp=fopen("bite.txt","w");
  if(fp==NULL)
  {
    perror("fopen");
    return 1;
  }
  char buffer[]="linux so easy!\n";
  fwrite(buffer,sizeof(char),strlen(buffer),fp);
  fclose(fp);
  return 0;
}
